1785: American naturalist, hunter and artist John James Audubon was born in present-day Haiti.
1865: John Wilkes Booth, the assassin of President Abraham Lincoln, was surrounded by federal troops near Bowling Green, Va., and killed.
1966: Hosmer woud have a weekly paper for the first time. The Hosmer Bulletin was to be published each Wednesday and featured one column each week in German.
1975: The Redfield post office had two firsts: Its first female mail carrier and its first motorized vehicles for mail delivery.
1986: A major nuclear accident occurred at the Chernobyl plant in Ukraine (then part of the Soviet Union) as an explosion and fire caused radioactive fallout to begin spewing into the atmosphere. At least 31 people died fighting the plant fire, but the number of other deaths resulting from the disaster remains in dispute.
2007: Vermont Gov. Howard Dean signed the nation's first bill allowing same-sex couples to form civil unions.
Source: Dacotah Prairie Museum and The Associated Press